andunix.net

Disable Core Dumps

Anonymous (anonymous@undisclosed.example.com) — 2014-05-16T06:36:00+00:00

Disable Core Dumps To disable core dumps create a file /etc/security/limits.d/no_core_dumps with the content * hard core 0: echo '* hard core 0' > /etc/security/limits.d/no_core_dumps Based on the “Nix Craft” article Linux Disable Core Dumps. linux sysadmin admin config

linux

Anonymous (anonymous@undisclosed.example.com) — 2017-04-13T20:13:51+00:00

linux Pages Bookmarks

ReLAX

Anonymous (anonymous@undisclosed.example.com) — 2009-11-27T16:36:00+00:00

ReLAX Thanks to Wolfgang Stief and Constantin Gonzalez, I got hold on one of the proceedings of the Linux Kongress and OpenSolaris Developer Conference. In this book, I found amoung other, also very interesting, articles one about LAX by Thomas Groß. LAX has some very interesiting concepts, but, unfortunately, it doesn't fit my needs. So I decided to take some of the concepts of LAX and build my own sysadmin-automation-framework.

Linux

Anonymous (anonymous@undisclosed.example.com) — 2013-02-04T22:17:24+00:00

Linux linux index linux topic

pargs for Linux

Anonymous (anonymous@undisclosed.example.com) — 2014-04-28T09:01:02+00:00

pargs for Linux If you miss pargs from Solaris, then try this: ps eww -p linux sysadmin cli

Gnome

Anonymous (anonymous@undisclosed.example.com) — 2016-07-22T10:23:04+00:00

Gnome gnome index linux gnome topic

Disable a Service

Anonymous (anonymous@undisclosed.example.com) — 2016-10-01T19:54:34+00:00

Disable a Service To disable a service: service stop update-rc.d enable|disable With systemd (starting with Debian 8): systemctl disable To (re)enable a service: update-rc.d enable|disable service stop

List Open Ports

Anonymous (anonymous@undisclosed.example.com) — 2017-04-13T20:11:34+00:00

List Open Ports To list the open ports together with the listening processes: netstat -tulpn Here is an example output: Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 695/sshd tcp6 0 0 :::22 :::* LISTEN 695/sshd udp 0 0 0.0.0.0:55872 …

init

Anonymous (anonymous@undisclosed.example.com) — 2013-07-03T13:03:11+00:00

init Managing init Scripts To activate an init script (“myscript”): update-rc.d myscript enable To deactivate an init script (“myscript”): update-rc.d myscript remove Further information can be found at Daemon - Debian Wiki sysadmin linux debian cli

Setting the Timezone

Anonymous (anonymous@undisclosed.example.com) — 2013-03-08T10:45:00+00:00

Setting the Timezone The timezone is stored in the file /etc/timezone. Check the Timezone cat /etc/timezone Example: # cat /etc/timezone Europe/London Set the Timezone You can use vi: vi /etc/timezone Or set it directy: echo "Europe/Berlin" > /etc/timezone

Cursor Size

Anonymous (anonymous@undisclosed.example.com) — 2016-07-12T09:43:10+00:00

Cursor Size To change the mouse cursor size in GNOME, use this command. Substitute the value 32 with your prefered size. gsettings set org.gnome.desktop.interface cursor-size 32 desktop gnome linux mouse cursor settings

Set the Timezone on Debian

Anonymous (anonymous@undisclosed.example.com) — 2013-02-04T22:17:38+00:00

Set the Timezone on Debian Just run the following command as root (use su or sudo): dpkg-reconfigure tzdata sysadmin linux debian timezone configure

SSH

Anonymous (anonymous@undisclosed.example.com) — 2015-11-30T12:09:18+00:00

SSH SSH with Public Key Authentication only /etc/ssh/sshd_config Make sure that your SSH config file (sshd_config) contains these settings: PubkeyAuthentication yes PasswordAuthentication no If you changed the config, make sure to restart sshd to activate ist:

Install the Java-Plugin for Firefox

Anonymous (anonymous@undisclosed.example.com) — 2014-09-05T12:12:53+00:00

Install the Java-Plugin for Firefox To install the Java plugin for Firefox, you have to create a symlink from Firefox's plugin directory /usr/lib/firefox-addons/plugins/ to the file libnpjp2.so in the JRE's “lib” dir. sudo ln -s \ ${JAVA_HOME}/jre/lib/amd64/libnpjp2.so \ /usr/lib/firefox-addons/plugins/libnpjp2.so

Cleanup Packages

Anonymous (anonymous@undisclosed.example.com) — 2014-04-28T09:01:22+00:00

Cleanup Packages Purge uninstalled Packages If a package is removed, it is only uninstalled, but the configuration remains on the system. This is a good thing, as you are able to reinstall the package and have it configured with the old configuration. But if you want to cleanup this old stuff, you can ge a list of uninstalled (but not purged) packages with this command:

Debian

Anonymous (anonymous@undisclosed.example.com) — 2013-03-08T10:45:50+00:00

Debian debian index linux debian topic